Angle and Triangle Review

Triangles and Angles Review

by SAMUEL BEARD

​How to find a missing angle in a triangle..

• ​All triangle angles add up to 180

• ​To find the missing angle....SUBSTRACT

• ​What is B?

• ​START WITH 180!!!

  • ​Take away 100 and then take away 55

  • ​180-100 = 80. 80-55=

​Types of Angles

• Angles that are 90 degrees are called RIGHT ANGLES

• ​Angles that are more than 90 degrees are called OBTUSE ANGLES

• ​Angles that are less than 90 are called ACUTE ANGLES

Multiple Choice

Angles that are exactly 90 degrees are called _____ ______.

• tight angles
• acute angles
• obtuse angles
• right angles

Multiple Choice

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

Multiple Choice

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Multiple Choice

Find the measure of the indicated angle. 

• 95
• 85
• 35
• 45

Multiple Choice

Find the measure of each angle indicated.

• 62
• 53
• 71
• 50

Multiple Choice

Find the measure of each angle indicated.

• 50
• 20
• 29
• 48

Multiple Choice

If two angles in a triangle are $$45\degree$$  and $$\ 75\degree$$ , what is the measure of the third angle?

• $$75\degree$$  

• $$90\degree$$  

• $$60\degree$$  

• $$70\degree$$  

Exterior Angle Theorem

You can use the inside and outside angles of a triangle to solve math problems!

Multiple Choice

Find the measure of each angle indicated.

• $$70\degree$$

• $$170\degree$$

• $$10\degree$$

• $$40\degree$$

Multiple Choice

Find the measure of each angle indicated.

• $$5\degree$$

• $$165\degree$$

• $$65\degree$$

• $$60\degree$$

Multiple Choice

Find the measure of each angle indicated.

• $$94\degree$$

• $$30\degree$$

• $$40\degree$$

• $$86\degree$$

Multiple Choice

Which line is the transversal?

• l

• n

• m

• None

Multiple Select

Find the value of the indicated angle.

• $$65\degree$$

• $$115\degree$$

Multiple Choice

Find the value of the indicated angle.

• $$114\degree$$

• $$66\degree$$

Multiple Choice

Find the value of x.

• $$65\degree$$  

• $$115\degree$$  

Multiple Select

Select the pair of angles that are alternate interior angles

• $$\angle2\ \ \&\ \angle7$$

• $$\angle3\ \ \&\ \angle6$$

• $$\angle1\ \ \&\ \angle7$$

Multiple Select

Select all the angles that are alternate exterior angles

• $$\angle1\ \&\ \angle8$$

• $$\angle4\ \&\ \angle6$$

• $$\angle2\ \&\ \angle7$$

• $$\angle3\ \&\ \angle5$$